Spade-type boring bit



FIG. 1 is a front perspective view of a first embodiment of our newdesign;

FIG. 2 is a rear elevational view thereof, taken from the side oppositethat illustrated in FIG. 1;

FIG. 3 is a side elevational view thereof, taken from the side oppositethat illustrated in FIG. 1;

FIG. 4 is a slightly enlarged top plan view thereof;

FIG. 5 is a slightly enlarged bottom plan view thereof;

FIG. 6 is an enlarged cross-sectional view thereof, taken along line6--6 of FIG. 2;

FIG. 7 is a front perspective view of a second embodiment of our newdesign;

FIG. 8 is a rear elevational view thereof, taken from the side oppositethat illustrated in FIG. 7;

FIG. 9 is a side elevational view thereof, taken from the side oppositethat illustrated in FIG. 7;

FIG. 10 is a slightly enlarged top plan view thereof;

FIG. 11 is a slightly enlarged bottom plan view thereof; and,

FIG. 12 is an enlarged cross-sectional view thereof, taken along line12--12 of FIG. 8.

The broken lines in the Figures are shown for illustrative purposes onlyand form no part of the claimed design.

The ornamental design for a spade-type boring bit, as shown anddescribed.